This book will teach you step-by-step how to perform addition, subtraction, division, multiplication, square roots and practical examples on a Japanese abacus. Great for both children...
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This book will teach you step-by-step how to perform addition and subtraction on a Japanese abacus. Clearly explained with text and colored pictures throughout every stage of your calculation...
Подробно
Learn to add and subtract in your head by imagining an abacus to calculate the result. This workbook has 1882 problems with answers. Example: Learn to calculate 415-350+233-155+44 quickly,...
Подробно
Learn to add and subtract in your head by imagining an abacus to calculate the result. Example: Learn to calculate 415-350+233-155+44 quickly, just by imagining an abacus. This book...
Подробно
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